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Diffstat (limited to 'sound/soc/codecs/lm4857.c')
-rw-r--r--sound/soc/codecs/lm4857.c213
1 files changed, 52 insertions, 161 deletions
diff --git a/sound/soc/codecs/lm4857.c b/sound/soc/codecs/lm4857.c
index 9f9f59573f72..26cdb750cbca 100644
--- a/sound/soc/codecs/lm4857.c
+++ b/sound/soc/codecs/lm4857.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* LM4857 AMP driver
*
@@ -5,30 +6,23 @@
* Author: Graeme Gregory
* graeme.gregory@wolfsonmicro.com
* Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
-struct lm4857 {
- struct i2c_client *i2c;
- uint8_t mode;
-};
-
-static const uint8_t lm4857_default_regs[] = {
- 0x00, 0x00, 0x00, 0x00,
+static const struct reg_default lm4857_default_regs[] = {
+ { 0x0, 0x00 },
+ { 0x1, 0x00 },
+ { 0x2, 0x00 },
+ { 0x3, 0x00 },
};
/* The register offsets in the cache array */
@@ -42,99 +36,33 @@ static const uint8_t lm4857_default_regs[] = {
#define LM4857_WAKEUP 5
#define LM4857_EPGAIN 4
-static int lm4857_write(struct snd_soc_codec *codec, unsigned int reg,
- unsigned int value)
-{
- uint8_t data;
- int ret;
-
- ret = snd_soc_cache_write(codec, reg, value);
- if (ret < 0)
- return ret;
-
- data = (reg << 6) | value;
- ret = i2c_master_send(codec->control_data, &data, 1);
- if (ret != 1) {
- dev_err(codec->dev, "Failed to write register: %d\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-static unsigned int lm4857_read(struct snd_soc_codec *codec,
- unsigned int reg)
-{
- unsigned int val;
- int ret;
-
- ret = snd_soc_cache_read(codec, reg, &val);
- if (ret)
- return -1;
-
- return val;
-}
-
-static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
-
- ucontrol->value.integer.value[0] = lm4857->mode;
-
- return 0;
-}
-
-static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
- uint8_t value = ucontrol->value.integer.value[0];
-
- lm4857->mode = value;
-
- if (codec->dapm.bias_level == SND_SOC_BIAS_ON)
- snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, value + 6);
-
- return 1;
-}
-
-static int lm4857_set_bias_level(struct snd_soc_codec *codec,
- enum snd_soc_bias_level level)
-{
- struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
-
- switch (level) {
- case SND_SOC_BIAS_ON:
- snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, lm4857->mode + 6);
- break;
- case SND_SOC_BIAS_STANDBY:
- snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, 0);
- break;
- default:
- break;
- }
-
- codec->dapm.bias_level = level;
-
- return 0;
-}
+static const unsigned int lm4857_mode_values[] = {
+ 0,
+ 6,
+ 7,
+ 8,
+ 9,
+};
-static const char *lm4857_mode[] = {
+static const char * const lm4857_mode_texts[] = {
+ "Off",
"Earpiece",
"Loudspeaker",
"Loudspeaker + Headphone",
"Headphone",
};
-static const struct soc_enum lm4857_mode_enum =
- SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode);
+static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
+ LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
+
+static const struct snd_kcontrol_new lm4857_mode_ctrl =
+ SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),
+ SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
+
SND_SOC_DAPM_OUTPUT("LS"),
SND_SOC_DAPM_OUTPUT("HP"),
SND_SOC_DAPM_OUTPUT("EP"),
@@ -156,86 +84,51 @@ static const struct snd_kcontrol_new lm4857_controls[] = {
LM4857_WAKEUP, 1, 0),
SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
LM4857_EPGAIN, 1, 0),
-
- SOC_ENUM_EXT("Mode", lm4857_mode_enum,
- lm4857_get_mode, lm4857_set_mode),
};
-/* There is a demux between the input signal and the output signals.
- * Currently there is no easy way to model it in ASoC and since it does not make
- * much of a difference in practice simply connect the input direclty to the
- * outputs. */
static const struct snd_soc_dapm_route lm4857_routes[] = {
- {"LS", NULL, "IN"},
- {"HP", NULL, "IN"},
- {"EP", NULL, "IN"},
+ { "Mode", NULL, "IN" },
+ { "LS", "Loudspeaker", "Mode" },
+ { "LS", "Loudspeaker + Headphone", "Mode" },
+ { "HP", "Headphone", "Mode" },
+ { "HP", "Loudspeaker + Headphone", "Mode" },
+ { "EP", "Earpiece", "Mode" },
};
-static int lm4857_probe(struct snd_soc_codec *codec)
-{
- struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
- struct snd_soc_dapm_context *dapm = &codec->dapm;
- int ret;
-
- codec->control_data = lm4857->i2c;
-
- ret = snd_soc_add_codec_controls(codec, lm4857_controls,
- ARRAY_SIZE(lm4857_controls));
- if (ret)
- return ret;
-
- ret = snd_soc_dapm_new_controls(dapm, lm4857_dapm_widgets,
- ARRAY_SIZE(lm4857_dapm_widgets));
- if (ret)
- return ret;
-
- ret = snd_soc_dapm_add_routes(dapm, lm4857_routes,
- ARRAY_SIZE(lm4857_routes));
- if (ret)
- return ret;
+static const struct snd_soc_component_driver lm4857_component_driver = {
+ .controls = lm4857_controls,
+ .num_controls = ARRAY_SIZE(lm4857_controls),
+ .dapm_widgets = lm4857_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
+ .dapm_routes = lm4857_routes,
+ .num_dapm_routes = ARRAY_SIZE(lm4857_routes),
+};
- snd_soc_dapm_new_widgets(dapm);
+static const struct regmap_config lm4857_regmap_config = {
+ .val_bits = 6,
+ .reg_bits = 2,
- return 0;
-}
+ .max_register = LM4857_CTRL,
-static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
- .write = lm4857_write,
- .read = lm4857_read,
- .probe = lm4857_probe,
- .reg_cache_size = ARRAY_SIZE(lm4857_default_regs),
- .reg_word_size = sizeof(uint8_t),
- .reg_cache_default = lm4857_default_regs,
- .set_bias_level = lm4857_set_bias_level,
+ .cache_type = REGCACHE_FLAT,
+ .reg_defaults = lm4857_default_regs,
+ .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
};
-static int lm4857_i2c_probe(struct i2c_client *i2c,
- const struct i2c_device_id *id)
+static int lm4857_i2c_probe(struct i2c_client *i2c)
{
- struct lm4857 *lm4857;
- int ret;
+ struct regmap *regmap;
- lm4857 = devm_kzalloc(&i2c->dev, sizeof(*lm4857), GFP_KERNEL);
- if (!lm4857)
- return -ENOMEM;
+ regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
- i2c_set_clientdata(i2c, lm4857);
-
- lm4857->i2c = i2c;
-
- ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
-
- return ret;
-}
-
-static int lm4857_i2c_remove(struct i2c_client *i2c)
-{
- snd_soc_unregister_codec(&i2c->dev);
- return 0;
+ return devm_snd_soc_register_component(&i2c->dev,
+ &lm4857_component_driver, NULL, 0);
}
static const struct i2c_device_id lm4857_i2c_id[] = {
- { "lm4857", 0 },
+ { "lm4857" },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
@@ -243,10 +136,8 @@ MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
static struct i2c_driver lm4857_i2c_driver = {
.driver = {
.name = "lm4857",
- .owner = THIS_MODULE,
},
.probe = lm4857_i2c_probe,
- .remove = lm4857_i2c_remove,
.id_table = lm4857_i2c_id,
};
generated by cgit (git 2.34.1) at 2025-12-25 11:53:46 +0000